Host memory stats are not updated

[Rubueno]

ISSUE TYPE

• Improvement Request

COMPONENT NAME

LibvirtComputingResource

CLOUDSTACK VERSION

>= 4.15

I think this issue present in any version, although I've not looked further than 4.15.

CONFIGURATION

N/A

OS / ENVIRONMENT

N/A

SUMMARY

Host memory stats are not updated frequently, leading to (possible) overcommit issues when live migrating VMs to a host. A manual restart of cloudstack-agent does update the stats, although this is not a good solution.

STEPS TO REPRODUCE

- Use any KVM hypervisor
- In my case in agent.properties: host.reserved.mem.mb=65536
- Migrate VMs to it until you reach capacity
- It is possible to exceed the host reserved memory

EXPECTED RESULTS

There should always be RAM available of at least what is specified in agent.properties: host.reserved.mem.mb

ACTUAL RESULTS

CloudStack will commit 100% of the host's available RAM to instances

[boring-cyborg]

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[Rubueno]

I have proposed a patch in #6622

[shwstppr]

Fixed with #6622